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    <title>Document</title>
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    <script>
        let arr = [1,2,3]

        let arr2 = [...arr] // [1,2,3]

        let obj = {
            name:'yuonly',
            age:19
        }

        let obj2 = {
            address:'宏福科技园',
            ...obj
        }
        console.log(obj2)
    </script>
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